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Biomedical subjects

F C Loh

Publications and source records attributed to F C Loh.

32 records · Page 2Linked to original sources
PubMed1989

Florid osseous dysplasia in Orientals.

Florid osseous dysplasia has been described as a condition that characteristically affects the jaws of middle-aged black women. It usually manifests as multiple radiopaque cementum-like masses distributed throughout the jaws. This condition has also been classified by various authors as sclerosing osteomyelitis, sclerosing osteitis, sclerotic cemental masses, gigantiform cementoma, and various other terms. In this series, we want to document eight cases of florid osseous dysplasia in middle-aged, female ethnic Chinese and one case in an Indian subject on the basis of radiographic and histopathologic findings. On the basis of this series, incidence is estimated to be 0.01 case per year 100,000 population. Florid osseous dysplasia constitutes 11% of cemental lesions in our files.

Adult↗
PubMed1989

Talisman in the orofacial region.

Among the various traditional beliefs and practices of the peoples of the Southeast Asia region is the practice of inserting talismans under the skin in various parts of the human body. In the orofacial region, these talismans (also called charm needles or charm pins) are also seen, usually as incidental radiographic findings. These talismans are believed to enhance the beauty of the wearers, as well as to provide protection to the wearers against harm. It is also believed that they could help the wearer obtain favorable business deals inasmuch as they are believed to have a "spell-like" influence on the business counterparts. In the present series, 67% of the patients are female and 66% of them are Muslim. Very little is known about the possible ill effects of these talismans because there is no report of these radiographic findings in major dental journals. In the present series of 12 cases representing a total of 65 talismans, only one talisman was surgically removed. We believe that generally no definitive treatment is required. However, we believe that the existence of these talismans should be made known so that they will not be misdiagnosed and mismanaged.

Adult↗
PubMed1989

Serious circulatory disturbance after Le Fort I osteotomy. A case report.

Severe impairment of the blood supply occurred in a patient who underwent a Le Fort I type osteotomy in which the fragment was displaced in a cranio-dorsal direction. Necrosis with sequestration of the torus palatinus present and some permanent parodontal damage ensued. Alternative procedures and management of developing circulatory impairment during surgery are discussed.

Adult↗
PubMed1989

Histoplasmosis presenting as hyperplastic gingival lesion.

A case of histoplasmosis presenting as ulcerated, hyperplastic gingiva and with no other systematic signs and symptoms is reported. The clinical presentation and the rarity of this condition led one of us to the differential diagnosis of a malignant lesion. The correct diagnosis was made after histological examination and tissue culture which yielded Histoplasma capsulatum. The patient was successfully treated with ketoconazole.

Adult↗
PubMed1989

Multiple odontogenic keratocysts of the jaws. Case report.

Single odontogenic cysts are very well documented in the literature. Of those less common reports concerning multiple jaw cysts, many have been associated with systemic conditions or syndromes such as Gorlin-Goltz or basal cell naevus syndrome, Hunter's syndrome and mucopolysaccharidosis, for example, Maroteaux-Lamy syndrome. A case of multiple odontogenic keratocysts unassociated with any syndrome is reported so as to add to the growing number of such cases in the literature. The possibility of this case being a partial expression of the Gorlin-Goltz syndrome is discussed.

Adolescent↗
PubMed1989

Retrograde removal of fractured endodontic instruments.

During root canal therapy, accidental fracture of endodontic instruments may occur. While in the majority of such cases the fragment concerned can be retrieved non-surgically, there are some occasions that surgical intervention is needed in order to remove the broken tip lodged within the root canal. In this paper the authors would like to suggest a management approach to this uncommon and extremely unpleasant complication in dental practice.

Adolescent↗
PubMed1989

Intraoral vertical ramus osteotomy.

In corrective surgery for mandibular prognathism, the vertical ramus osteotomy, also known as the vertical subsigmoid osteotomy (VSS) is one of the simplest osteotomy to perform and therefore widely popular with oral & maxillofacial surgeons. Traditionally, the surgical approach for VSS is by the extra-oral approach although the approach may be either extraoral or intraoral. In this paper, the main advantages and disadvantages of the following three techniques, i.e. VSS via extraoral approach, VSS via intraoral approach and the sagittal split ramus osteotomy will be discussed. The vertical ramus osteotomy via the intraoral approach is not usually performed in Singapore until recently. The authors would like to present the observations and a surgical technique employed by them to perform VSS osteotomy via an intraoral approach.

Humans↗
PubMed1989

Profile changes following anterior subapical osteotomy in Chinese adults with bimaxillary protrusion.

Nineteen adult Chinese patients, aged 18 to 28 years, who sought treatment for bimaxillary protrusion were treated with combined maxillary and mandibular anterior subapical osteotomy and the extraction of one premolar in each quadrant. Intraoral cephalograms were taken pretreatment and an average of 19.8 months posttreatment. Significant cephalometric soft tissue changes (P less than .01) included increase at the nasolabial angle, reduction of both the upper and lower lip protrusions, lengthening of the upper lip, and decrease in the interlabial gap. The predictable success and the fact that these improvements in facial profile usually can be achieved in as little as 3 to 9 months make this mode of addressing bimaxillary protrusion a viable alternative to orthodontic treatment of adult patients with bimaxillary protrusion.

Adolescent↗
PubMed1987

The geriatric dental patient.

The life expectancy of our citizens has increased due to better living conditions and medical care. This poses new challenges to dental surgeons because geriatric dental patients have different needs brought on by ageing. Tooth loss, periodontal disease, alveolar bone resorption, mucosal changes, edentulism are just some of the problems faced by the elderly. Recognition of the dental needs of this special category of the population compels us to bear the responsibility of treating them now and in the future. We require a gerodontology programme that emphasizes prevention, maintenance of the oral health and understanding of their psychological status.

Aged↗
PubMed1986

Orthopantomographic survey.

An orthopantomographic survey was carried out on patients who attended routine dental appointments. The objectives were; to find out the incidence of clinically undetected pathologies and also to ascertain if normal anatomical structures are readily visible on the radiographs. The identification of these structures is important in correct diagnosis and oral surgical procedures. The survey showed that most normal anatomical structures can be positively identified and the inter-examiner consistency was high. The survey also showed that the consistency ratio in detecting dental caries was poor. About 50% of the patients had impacted/non-erupted teeth with female patients having a higher incidence. The percentage of patients with radiolucencies and radiopacities were 11% and 19% respectively. The orthopantomogram was found to be not ideal in measuring bone loss as a high percentage of the proximal surfaces were not measurable.

Adolescent↗